CVE-2023-28709: Apache Tomcat

High severity, CVSS 7.5. EPSS: 48% chance of exploitation in the next 30 days.

The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount parameters in the query string, the limit for uploaded request parts could be bypassed with the potential for a denial of service to occur.

Affected products

• Apache Tomcat: from 8.5.85, up to and including 8.5.87; from 9.0.71, up to and including 9.0.73; from 10.1.5, up to and including 10.1.7; version 11.0.0 only
• Debian Debian Linux: version 12.0 only
• Netapp 7-Mode Transition Tool: affected versions not specified

Published 2023-05-22. Last modified 2026-06-17.